Steam-engine



2 Sheets-Sheet 1.

(No Model.)

J. H. UARRIGER.

STEAM ENGINE.

Patented Dec. 9, 1890.

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(No Model.) w 2' Sheets-Sheet 2.

J. H. GARBIG-ER. STEAM ENGINE.

o; 442,572. Patented Dec. 9, 1890.

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UNITED STATES PATENT @EFTCE.

JOHN HARVEY CARRIGER, OF KNOXVILLE, TENNESSEE.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 442,572, dated December9, 1890.

Application filed Dotober 21, 1889. Serial No. 327,750. (No model.)

To all whom it may concern:

Be itkn own that I, JOHN HARVEY OARRIGER, a citizen of the UnitedStates, residing at Knoxville, in. the county of Knox and State ofTennessee, have invented a new and useful Improvement in Steam-Engines,of which the following is a specification.

The object of my invention is to improve the construction and efficiencyof rotary engines; and it consists in the matters hereinafter described,and particularly pointed out in the claims. T y

In the accompanying drawings, Figure 1 is a transverse section of acylinder with hinged valves or partitions and piston with pistonwings.Fig. 2 isa longitudinal section of the cylinder. Fig. 3 is a similarview of the piston and wings. Fig. sis an elevation of the same partlybroken away. Fig. 5 is an'end elevation of the cylinder, thepiston-shaft being shown in section. Fig. 6 is apartial view similar toFig. 1. Fig. 7 is a partial end elevation showing valve-operatingmechanism; and Fig. Sis a section of same on line at as of Fig. 7.

A denotes the engine-shaft, which passes through the cylinder and pistonand is keyed to the piston in any usual manner.

B indicates the piston, and D the cylinder. E E indicate packings,(shown in full lines in Fig. at and in dotted lines in Fig. 1,) andO Care semi-cylindrical casings, which envelop These latter are cylindricaland shorter than the drum or body B of the piston, and are pressedoutward against the cylinder-heads by the springs S S, arranged betweenthe cylinder B and the casings C C.

H is a recess in the drum B, to receive a catch attached to the interiorof the casing O to hold it in position 011 the packing E E.

J J indicate the sections of a cylinder-head, provided with dianietricflanges for securing bolts.

2, at, and U are induction, and 1, 3, and 5 eduction, ports.

G is a spring to aid in opening the valve 1 P when steam is cut off atinlet 2. Each wing must be provided with such spring.

F F indicate ports in the cylinder-wall, along which and by thepiston-wing steam passes for a moment while the adjacent exhaust-portsare closed. The steam thus introduced between the wing and the valveopens or helps to open said valve co-operating with spring G, the maineffect of the latter, however, being to prevent injurious concussion ofthe wing and valve. These valves three in number in the presentinstanceare journaled or hinged in recesses in the cylinder-wall, andthey and the recesses are shaped substantially as indicated, so thatwhen a valve is open it lies in a recess out of the path of thepiston-wing, the interior surface of the valve at such time beingcurvilinear and continuous with the inner surface of the cylinder. Thesevalves and wings extend the whole length of the piston or of thecylinder interior, and the latter are adapted to divide or partition offthe steam-space of the cylinder in three equal parts when closed orextended across the same. The valves are located adjacent to theinlet-ports, and the cylinder-wall is suitably thickened at such points,as shown. The wings are cleft or have two parts, and receive betweenthese parts a packin a, which is pressed outwardly by a spring 0.

b 1) indicate packings at the side of packings a a, and the springs 0press the latter toward the cylinder-heads and the former toward thecircumferential wall of the cylinder, having thus double action.

The operation of the engine is as follows:

At suitable intervals live steam enters the ports 2, 4, and (i and movesthe valves P, so that they are closed or extended across the spacebetween the piston and cylinder and prevent the backward escape ofsteam. They are sufficiently wide to stand at a slight incline and bearon the piston, whereby the piston revolves with little friction. Thesteam checked in one direction in the other presses the piston-wings \Vand moves them around together with the piston, driving exhauststeamout. of the ports 1, 3, and 5 until the said wings near said ports, atwhich time a portion of the exhaust-steam is forced through the channelsF and opens the valves P, forcing them back into their recesses and outof the path of the wings, a spring G being preferably placed on eachwing to obviate the concussion of the wings upon the valves.

Any known means may be employed for the suitable and timely opening andclosing of the induction and eduction ports. In Fig. 7 are shown devicesfor this purpose.

G is a spring located on the exterior of the cylinder and having one endattached to the cylinder-head and the other to a crank-arm on the axisof a valve P. Its effect is to aid in opening the valve, havingsufficient tension to effect this only when live steam is out off, andbeing then aided by the exhaust through passage F. Normally it is putunder tension by steam, which closes the valve as it enters thecylinder. It will of course be understood that each valve-stem isprovided with such spring.

K indicates a cam for operating the valves of the inlet and exhaustports.

L L are levers pivoted in brackets M M, and pivotally connected withsliding valve-stems N N. Friction-Wheels are indicated by O O. Therevolution of the cam K moves the lower end of each lever L to and fromthe cylinderhead, as will be readily understood, the valves, one for thelive and the other forthe exhaust steam, being therebysuitably operated.Obviously this cam can be varied to move the valves more or lessfrequently, according to the number of piston Wings and valves employed.

Referring more particularly .to Fig. 1 in the illustration, it should beunderstood that induction-ports 2 are assumed to be closed, but abouttobe opened, and that so soon as the piston-Wing 1 IV has moved by thevalve 1 P the entering steam will close the valve' across the spacebetween the piston and cylinder and will drive the wing forward, forcingthe exhaust-steam in front of it out at ports 3 until such time as thesaid eductionports are closed, whereupon steam passes Having thusdescribed my invention, what I desire to secure by Letters Patent is- 1.In a rotary engine, the combination of the cylinder provided withadjacent induction and eduotion ports and the bypass con- (1 uit, avalve hinged in a recess in the cylinder and adapted to lie therein whenopen and thereby cover the inlet, a piston-win g, a spring G, secured toand carried by said wing and adapted to bear on the opening valve to obviate concussion, and a spring G, adapted to open the valve,substantially as set forth.

2. In a rotary engine, the combination of the cylinder provided withexhaust-ports and a by-pass conduit, a piston provided with wings, avalve hinged in the cylinder and adapted to divide the stean1-spacebetween the cylinder and piston, and devices for suitably closing theexhaust-port, whereby exhaust-steam can be utilized to open the valve,substantially as set forth.

3. In a rotary engine, the combination of the cylinder provided withexhaust-ports and a by-pass conduit, a piston provided with wings, avalve hinged in the cylinder and piston, a spring adapted to open saidvalve, and devices for suitably closing the exhaust port, wherebyexhaust-steam can be utilized to open the valve and cooperate with thesaid spring, substantially as set forth.

J OH HARVEY CARRIGER.

\Vitnesses \V. S. BRADLEY, ll. L. BRADLEY.

